Sliding door lock assembly



Feb. 28, 1956 F. R.' 'COLLAR SLIDING DOOR LOCK ASSEMBLY Filed June 15.1953 United States Patent O SLIDING DOOR LOCK ASSEMBLY Frank R. Collar,Los Angeles, Calif., assignor to Adams Rite Manufacturing Company,Glendale, Calif., a corporation of California Application June 15, 1953,Serial No. 361,721

7 Claims. (Cl. 70-100) My invention relates in general to locks of thetype employed on sliding doors and relates in particular to a door lockhaving a swingably mounted lock lever which moves into locking positionwith a hook action.

It is an object of the invention to provide'a simple yet strong doorlock which has means for preventing movement of the locking lever intoprojecting locking position unless the door with which the lock isassociated is closed. This feature of the invention is regarded as beingespecially valuable since it prevents the inadvertent operation of thelocking lever into extended position when the door is in open positionwith the result that if the door were then moved toward closed positionthe projecting locking lever would strike the lock plate mounted in thedoor frame.

It is an object of the invention to provide a lock of the character setforth in the preceding paragraph having a locking part for preventingextension of the locking lever, and a pin member projecting from thelock structure so as to be depressed when the door is closed, therebyreleasing the locking parts which prevent operation of the lockinglever, whereupon the lock may be actuated to swing the locking leverinto extended locking position.

A further object of the invention is to provide in this lock mechanism asimple means of adjustment whereby the extension of the locking lever,when it is in locking position, may be adjusted so that the hook elementof the locking lever will be then arranged for a cooperation with thelock plate mounted in the door frame.

It is a further object of the invention to provide a simple lockvconstruction having an operating crank with an extended lever portionconnected by a link to the swingable locking lever, whereby rotation ofthe operating crank will swing the locking lever into locking positionand positively hold the locking lever inL such position, so that thelocking lever cannot be moved into retracted position by forceexternally applied thereto.

A further object of the invention is to pivotally mount the lockinglever on a swingable support arranged to be swung forwardly andrearwardly by operation of an adjusting screw, thereby providingadjustment of the extension ofthe locking lever from the housing orsupporting member of the lock device.

Further objects and advantages ofthe invention may be brought out in thefollowing part of the specification wherein I have described a preferredembodiment ofthe invention in considerable detail so asl to enableothers to easily understand the invention, without limiting to detailsthe invention which has the scopeA defined by the accompanying claims.

Referring to the drawings which are for illustrative purposes only:

Fig. l is a fragmentary elevational view showing a preferred embodimentof my invention mounted in the edge of a door and engaging a lockingplate mounted in a door frame;

Fig. 2 is a view showing the lock device of Fig. 1 with one of theplates thereof removed soV as to disclose the internal lock mechanism;

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Fig. 3 is a view similar to Fig. 2, but showing the locking lever inretracted position;

Fig. 4 is sectional view taken as indicated by the line 4--4 of Fig. 3;

Fig. 5 is a perspective view of the plate for locking the operatingcrank of the lock mechanism;

Fig. 6 is a sectional View taken as indicated by lin'e16-6 in Fig. 3.

In Fig. 1, I show a lock mechanism 10 mounted in a recess 1.1 in thefront edge of a door 12. The door 12 is shown in closed position, thatis, with the edge thereof abutting the edge of a door frame member 13 towhich a locking plate 1'4 is secured by screws 15. The locking plate 14has therein an opening 16 through which the outer, hook end 17 of alocking lever I8 may pass. In Fig. l the' locking lever 18 is shown inlocking position with the hook end 17' thereof extending down across theinner face 20 of the locking plate 14 adjacent the lower end of theopening 16.

The lock mechanism 10 comprises a housing or supporting member 21consisting essentially of a front plate 2'2 and a back plate 23. InFigs. 2 and 3 the front plate has been removed to show the mechanism ofthe Vlock structure. The back plate 23 has at the lateral edges thereofforwardly extending flanges to form inner and outer edge walls 24 and 25for the supporting member 21. The width of the front plate 22 is suchthat it will lie between the front edges 26 of the walls 24 and 25.Posts 27 and 28 are mounted respectively near the upper and lower endsof the back plate 23 and project forwardly toward the front plate 22.The front ends of the posts 27 and 28 have circular openings 29 toreceive screws 3`0` which pass through the front plate 22 and securesuch front plate 22 against the front ends of the posts 27 and 28. As

shown irr Figs. l and 4, the front and back plates 22 and 23 have nearthe upper lefthand portion thereof circular openings 29' and 30' which'receive the reduced ends 31 formed on the hub 32 of an operating crank33 having a lever portion 34 which extends horizontally and rightwardlywhen thelocking lever 18 is in retracted position as s hownfinV Fig. 3.The operating crank 33 has in its hub 32 a slot 35 adapted to be engagedfor the purpose of rotating the operating crank 33 between the positionsthereof shown in Figs. 2 and 3'.

The lever 34 of the operating crank' 33l has on the end thereof aprojection 36, Fig. 4, extending rearwardly toward the back plate 23.The lever 34 also has thereon a forwardly projecting pin 37 which isreceived in an opening 38 in the upper end of a flat link 39`which hasthe function of transmittingmotion' from the operating crank 33 to thelocking lever 18. The lower end of the link 39 engages a pin 40 whichprojects forwardly from the locking lever 18.

The inner end of the locking lever 18` is mounted on a lock pivot pin 41carried' by a movable member 42 arranged to be adjusted toward and awayfrom the edge wall 25, thereby providing means for adjusting the lockinglever 18 in its locking position. The movable member 42` is a swingablesupport for thepivot pin 41. It has an opening 43, Fig. 6, through whichthe lower post 28 extends. The lower end 44 of the member 42, below thepost-28 carries a nut 45 which is threaded on a screw 46. The rightwardend of the screw 46 has a head 47, a portion of which projects vwithinan opening 48 in the lower portion of the wall 25. The leftward end ofthe screw- 46 engages the wall 24' and rightward movement of the screwis limited by a pin 49 which is passed through a transverse opening inthe screw head 47 after the screw is passed through the opening 48. Byrotation of the screw 46, the nut 45 may be shifted, causing theswingable support 42 to swingon the post 28, thereby chang- ,ing theposition of the pivot pin` 41. In'Fig. 2 the pivot pin 41 is shown inits extreme leftward or retracted position so that the minimum space Sexists between the hook end 17 of the locking lever 18 and the wall 25.The width of the space S may be increased by rotating the screw 46 so asto move the nut 45 leftwardly, thereby swinging the support 42 inclockwise direction and shifting the pivot 41 and the locking lever 18rightwardly from the retracted position in which these parts are shown.

The invention provides means for locking the locking lever 18 in theretracted position in which it is shown in Fig. 3, so that this lockinglever 18 cannot be inadvertently swung from the retracted position inwhich it is shown in Fig. 3 to the extended position in which it isshown in Fig. 2, while the door is open. The advantage of thisarrangement is avoidance of injury to the lock mechanism or to the lockplate 14 by attempting to close the door with the locking lever 18 inextended position as shown in Fig. 2. A locking plate 50 is providedhaving a shoulder 52 resiliently held in a position to engage theprojection 36 of the crank lever 34 when the operating crank 33 is swungupwardly from the position in which it is shown in Fig. 2 to theposition in which it is shown in Fig. 3 to retract the locking lever 18.A spring 53 urges the locking plate 50 into the position in which it isshown in Fig. 2. Approaching the shoulder 52, the locking plate 50 isprovided with a curved sloping edge 54 which is engaged by theprojection 36 as the lever 34 is swung rightwardly and upwardly from theposition in which it is shown in Fig. 2, the pressure of the projection36 against the approaching edge 54, forcing the locking plate 50leftwardly against the action of the spring 53 until the projection 36has moved into a position above the shoulder 52, whereupon the spring 53will move the locking plate 50 back to its original position as shown inFigs. 2 and 3.

The locking plate 50 is formed from a simple stamping as shown in Fig.5. It has a pair of parallel legs 55 arranged to engage the upper andlower faces of the hub 32 so as to be guided thereby. Along the upperedge Yof the plate 50 there is a laterally bent portion 56 having on thefront or rightward portion thereof a projection 57 which extends outthrough an opening 58 in the upper portion of the wall as shown in Fig.2. The portion 56 also has thereon a stem 59 to support the spring 53.

When the door 12, Fig. 1, is closed the projection 57 engages and ispressed inwardly by the upper portion of the plate 14, thereby movingthe locking plate 50 leftwardly from the position in which it is shownin Figs. 2 and 3, with the result that as long as the door 12 is closed,the holding of the projection 57 in retracted position as shown in Fig.1 will effect holding of the locking plate 50 in retracted position.Therefore, at this time it is possible to rotate the operating crank 33from the position in which it is shown in Fig. 3 to the position thereofshown in Fig. 2, making it possible to swgig tllie locking lever 18 intolocking position as shown in 1g.

A further feature of the lock mechanism is that its locking member 18cannot be swung from the extended position in which it is shown in Fig.l by externally applied pressure to the retracted position in which it1s shown in Fig. 3. A spring 60, mounted on the forwardly extendingportion of the post 28 has its upper end 1 n engagement with the link 39and constantly urges the link 39 leftwardly. The crank lever 34 and thelink 39 are arranged as a toggle which is extended when the lever 34 1sswung down into the position in Which it is shown in Fig. 2 to extendthe locking lever 18. At this time. the pin 37 is disposed slightly tothe left of a line passing through the center of the hub 32 and thecenter of the pm 40, while at the same time the spring 60 urges theupper end of the link 39 leftwardly to prevent any POSSlbllliY of thecrank 33 being rotated in counterclockwise direction from the positionin which it is shown in Fig. 2 by upward force applied to the portion ofthe locking lever 18 which extends rightwardly from the face of the wall25.

I claim:

l. In a door lock: a supporting member arranged to be secured to a doorelement, said supporting member having front and rear spaced plates; anoperating crank carried by said supporting member, comprising a hub withend portions set in openings in said spaced plates, and a lever portionwith a projecting pin and a locking proj ection thereon spaced from saidhub; a swingable support having one end thereof pivotally connected tosaid sup porting member; a pivot pin on said swingable support; alocking lever swingable on said pivot pin from retracted position to aposition extending from said supporting member; an adjusting screw insaid supporting member; a nut on said adjusting screw connected to saidswingable support so that movement of said nut by rotation of saidadjusting screw will effect a swinging of said swingable' support andchange the position of said locking lever in its extended position; alink connecting said pin of said' operating crank with a portion of saidlocking lever to swing said locking lever between retracted and extendedpositions in response to swinging of said operating crank between rstand second positions thereof; a locking plate having a part projectingfrom said supporting member in such position that it will project fromthe edge of said door element, said locking plate being movable fromex-f tended to retracted position and having a shoulder oper-r atingwhen said locking plate is in extended position to engage saidprojection when said crank is in said first position thereof to preventrotation of said operating crankl from said rst to said second positionthereof; and springi means urging said locking plate into said extendedposition thereof and permitting movement thereof into retracted positionby pressure applied to said projecting part.

2. In a door lock: a supporting member arranged to be secured to a doorelement; an operating crank carried by said supporting member so as tobe swingable between first and second positions; a swingable supporthaving one end thereof pivotally connected to said supporting member; apivot pin on said swingable support; a locking lever swingable on saidpivot pin from retracted position to a position extending from saidsupporting member; an adjusting screw in said supporting member; a nuton said adjusting screw connected to said swingable support so thatmovement of said nut by rotation of said adjusting screw will eiect aswinging of said swingable support and change the position of saidlocking lever in its extended position; a link connecting said operatingcrank with a portion of said locking lever to swing said locking leverbetween retracted and extended positions in response to swinging of saidoperating crank between rst and second positions thereof; a lockingplate having a part projecting from said supporting member in suchposition that it will project from the edge of said door element, saidlocking plate being movable from extended to retracted position andhaving a shoulder operating when said locking plate is in extendedposition to engage said crank when it is in said rst position thereof toprevent rotation of said operating crank from said first to said secondposition thereof; and spring means urging said locking plate into saidextended position thereof and permitting movement thereof into retractedposition by pressure applied to said projecting part.

3. In a door lock: a supporting member arranged to be secured to a doorelement, said supporting member having front and rear spaced plates; anoperating crank carried by said supporting member, comprising a hub withend portions set in openings in said spaced plates, and a lever portionwith a projecting pin and a locking projection thereon spaced from saidhub; a pivot pin on said 'supporting member; a locking lever swingableon pivot pin from retracted position to a position extending from saidsupporting member; a link connecting said pin of said operating crankwith a portion of said locking lever to swing said locking lever betweenretracted and extended positions in response to swinging of saidoperating crank between first and second positions thereof; a lockingplate having a part projecting from said supporting member in suchposition that it will project from the edge of said door element, saidlocking plate being movable from extended to retracted position andhaving a shoulder operating when said locking plate is in extendedposition to engage said projection when said crank is in said firstposition thereof to prevent rotation of said operating crank from saidfirst to said second position thereof; and spring means urging saidlocking plate into said extended position thereof and permittingmovement thereof into retracted position by pressure applied to saidprojecting part.

4. In a door lock: a supporting member arranged to be secured to a doorelement; an operating crank carried by said supporting member so as tobe swingable between iirst and second positions; a pivot pin on saidsupporting member; a locking lever swingable on said pivot pin fromretracted postion to a position extending from said supporting member; alink connecting said operating crank with a portion of said lockinglever to swing said locking lever between retracted and extendedpositions in response to swinging of said operating crank between firstand second positions thereof; a locking plate having a part projectingfrom said supporting member in such position that it will project fromthe edge of said door element, said locking plate being movable fromextended to retracted position and having a shoulder operating when saidlocking plate is in extended position to engage said crank when it is insaid first position thereof to prevent rotation of said operating crankfrom said first to said second position thereof; and spring means urgingsaid locking plate into said extended position thereof and premittngmovement thereof into retracted position by pressure applied to saidprojecting part.

5. In a door lock: a supporting member arranged to be secured to a doorelement, said supporting member having front and rear spaced plates; anoperating crank carried by said supporting member, comprising a hub withend portions set in openings in said spaced plates, and a lever portionwith a projecting pin and a locking projection thereon spaced from saidhub; a swingable support having one end thereof pivotally connected tosaid supporting member; a pivot pin on said swingable support; a lockinglever swingable 0n said pivot pin from retracted position to a positionextending from said supporting member; an adjusting screw in saidsupporting member; a nut on said adjusting screw connected to saidswingable support so that movement of said nut by rotation of saidadjusting screw will effect a swinging of said swingable support andchange the position of said locking lever in its extended position; anda link connecting said pin of said operating crank with a portion ofsaid locking lever to swing said locking lever between retracted andextended positions in response to swinging of said operating crankbetween first and second positions thereof.

6. In a door lock: a supporting member arranged to be secured to a doorelement; an operating crank carried by said supporting member so as tobe swingable between rst and second positions; a swingable supporthaving one end thereof pivotally connected to said supporting member; apivot pin on said swingable support; a locking lever swingable on saidpivot pin from retracted position to a position extending from saidsupporting member; an adjusting screw in said supporting member; a nuton said adjusting screw connected to said swingable support so thatmovement of said nut by rotation of said adjusting screw will effect aswinging of said swingable support and change the position of saidlocking lever in its extended position; and a link connecting saidoperating crank with a portion of said locking lever to swing saidlocking lever between retracted and extending positions in response toswinging of said operating crank between iirst and second positionsthereof.

7. In a door lock: a supporting member arranged to be secured to a doorelement; an operating crank carried by said supporting member so as tobe swingable between first and second positions; a movable support; apivot pin on said movable support; a locking lever swingable on saidpivot pin from retracted position to a position extending from saidsupporting member; an adjusting screw in said supporting member; a nuton said adjusting screw connected to said movable support so thatmovement of said nut by said screw will effect movement of said movablesupport and change the position of said locking lever in its extendedposition; and a link connecting said operating crank with a portion ofsaid locking lever to swing said locking lever between retracted andextending positions in response to swinging of said operating crankbetween iirst and second positions thereof.

References Cited in the iile of this patent UNITED STATES PATENTS452,738 Van Winkle May 19, 1891 667,023 Larsen Ian. 29, 1901 1,090,305Hoffman Mar. 17, 1914 1,420,215 Pike June 20, 1922 1,528,515 Taylor Mar.3, 1925 1,937,978 Miller Dec. 5, 1933 2,469,113 Hooker May 3, 1949FOREIGN PATENTS 17,895 Great Britain Aug. 2, 1912 316,567 Great BritainJuly 18, 1929 622,197 Germany Nov. 22, 1935

